Melting-furnace.



l. HALL.

MELTlNG FURNACE.

APPLICATION FILED OCT-19,1914.

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MELTING FURNACE.

APPLICATION FILED OCT. 19. 1914.

Patented Nov. 23, 1-915.

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I. HALL.

MELTlNG FURNACE.

APPLICATION FILED OCT. 19. 1914.

1,1 61 ,047. Patented Nov. 23, 1915.

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Specification of Letters Patent.

Application filed october 19, 1914. Serial No. 867,455.

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Referring to the accompanying drawings, Figure 1 is a section of the upper part of the furnace showing means for reciprocating the mixing member. Fig. 2 is a plan showing also the. valve regulating lever.

Fig. 3 shows the general arrangement of the furnace. Fig. 4.- shows a view at right angles to that shown in Fig. 3, the mixing lever being omitted'to show more clearly the operation of the valve in a preferredarrangement of the same. Figs. 5 and 6 show a pivoted gate or valve which may be located upon the end of the pouring spout of the furnace. Fig. v7 shows a preferred arrangement of the valve.

Such a furnace is filled with metal and heated by gas or otherwise from below. Some suitable arrangement must be made for allowing the metal to flow from the furnace to the molds or like when required,

and for greater convenience the furnace is provided with a regulating valve 1 located centrally and a reciprocating stirring device 2 attached to a sleeve 3 or the like surrounding the stem 4 of the said valve 1. The upper surface of the metal pot is enclosed by a cover 5 which may have sliding doors for the admission of metal for charging the pot and may have an arrangement of pipes and fines as described in my prior U. S. Patent No. 1117667, issued Nov. 17, 1914.

The stem 4: of the valve 1 I may take straight through the center of the cover 5 providing a stufling box 6 or like arrangement therein, and its upper end is connected directly or by a short link to a lever 7 pivoted to a bracket 8 disposed on the cover.

naces with the object of facilitating their The sleeve 3 of the stirring device which may be of. any U. S. Patent No. 1117667, issued Nov. 17, 1914,. may terminate in a loose collar (to permit rotation) or a fixed flange, asshown at '9 on the drawing, or lugs to which I attach preferably two rods 10 which pass also through gas tight joints in the cover, one being disposed upon either side of the valve stem and operating lever. In some cases three, four, or more rods may be employed, but thesleevearrangement is preferred as Patented Nev. 23,1915.

of the forms in my prior it tends to keep all dirt and dross from getting to the valve.

A pair of vertical supports 12 are provided with flanges 13 and bolted to the domed cover of the furnace near its outer edge, forming a support to the upper end of wh ch 1s pivoted the operating lever 14. A pro ect1on' 15 is formed upon one of the supports, slightly below the level of the pivot, through which abolt 16 is adapted to pass which engages slot 17 in the form of an arc of a circle having the pivot for its center, said slot beingformed in a similarly shaped portion 18 projecting upon the upper and lower sides of the lever. A. washer and wing nut 19 upon the bolt enable the lever to be secured in any desired position. The inner part of the lever extends approximately to the center of the furnace and terminates in a downwardly extending forked end to which a link bar 20 is pivoted, the lower end of the said bar being pivoted between two lugs 21 formed on the upper side of connecting plate to which the rods 10 connected to the mixing member are attached.

The lever may be formed in two parts or more if desired, for instance, adjacent to the portion in which the slot is formed, a socket 22 may be formed internally screw threaded for the reception of a length of pipe or other suitable handle 23.

It will be clear that this invention 0bvi-' 7 J serted from opposite endsof the holes and having asbestos packing 25 between their abutting extremities. r I 7 -It will be clear that the slot 17 in conjunction with the stationary pin or bolt. '16.

V limits the motion of the lever to the extent of the arc and consequently limits thev stroke of the mixer'tothis predetermined extent.

' Referring more particularly to Figs. 8, 4 5 and 6 the lever 7 is, pivoted to the bracket pin 28 through the-holes in the bracket the lever may be retained at a height corre-. sponding' to the positions of the different holes. In this manner the valve may be raised and the lever retained by means of the peg'to such a height as to givethe re-- quired flow at thepouring spout. As the molds or the like are filled, -however, it is desirable to check the flow; momentarily while fresh molds are placed in position or the mold 29 is inverted.

Figs. 5 and 6 representra gate which may be fixed upon the pouring spout by means of'the screw-threaded portion 30 formingpartofthebracket 31 to which "the gate proper 3 2 is pivoted at 83.

The gate 'may be provided'with a wooden Copies of this patent may be obtained for .live cents each, oyaddressing the comn i s s ioner of Pat ents, 7

formrfof stop or V handle 34, and may rest in a lip or like 35,

by means of which it is pressed against'the bracket 31, so checking the flow of'metal.

Fig. 7' shows thevalve to an enlarged scale,' the valve proper 1 being shown upon the seating 36 which is'retained-in the bottom of the .furnace means of the collar or nut 37. In order to'prevent. the dross or scum fuponthe surface of the metal from o getting past the valve'to thepouring spout I may provide a shield 38 provided with holes 39: upon the seatingiofthe valve, and

this may bescrewed into position as shown: l

upon the;drawings ff WhatI claim is I A melting-furnace comprisingiin combi:

upon said coversconnected to said valverod;

a substantially gastig-ht joint in saidicover through-which said valve-rod passes; a

valve seating in the; bottom of said pot; a

said valve; and aperforated shield sur-. round ng said'valve seatlng. In testimony whereof, I have s gned my two subscribing. witnesses;

\Vitnesses:

1 HARQLD. FORRES'IEE', 5. ARNOLD Si ILLSTON.

, Wa h ng 1 .3? I

. ouring; spout; to which access is; given by name to this specificationin thezpresenceof' 

